CVE-2022-50296

MEDIUM EPSS 4.5%
Published Sep 15, 20259mo ago · Modified Jun 17, 20261w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Sep 15, 2025 9mo ago
Last Modified Jun 17, 2026 1w ago

Description

In the Linux kernel, the following vulnerability has been resolved: UM: cpuinfo: Fix a warning for CONFIG_CPUMASK_OFFSTACK When CONFIG_CPUMASK_OFFSTACK and CONFIG_DEBUG_PER_CPU_MAPS is selected, cpu_max_bits_warn() generates a runtime warning similar as below while we show /proc/cpuinfo. Fix this by using nr_cpu_ids (the runtime limit) instead of NR_CPUS to iterate CPUs. [ 3.052463] ------------[ cut here ]------------ [ 3.059679] WARNING: CPU: 3 PID: 1 at include/linux/cpumask.h:108 show_cpuinfo+0x5e8/0x5f0 [ 3.070072] Modules linked in: efivarfs autofs4 [ 3.076257] CPU: 0 PID: 1 Comm: systemd Not tainted 5.19-rc5+ #1052 [ 3.099465] Stack : 9000000100157b08 9000000000f18530 9000000000cf846c 9000000100154000 [ 3.109127] 9000000100157a50 0000000000000000 9000000100157a58 9000000000ef7430 [ 3.118774] 90000001001578e8 0000000000000040 0000000000000020 ffffffffffffffff [ 3.128412] 0000000000aaaaaa 1ab25f00eec96a37 900000010021de80 900000000101c890 [ 3.138056] 0000000000000000 0000000000000000 0000000000000000 0000000000aaaaaa [ 3.147711] ffff8000339dc220 0000000000000001 0000000006ab4000 0000000000000000 [ 3.157364] 900000000101c998 0000000000000004 9000000000ef7430 0000000000000000 [ 3.167012] 0000000000000009 000000000000006c 0000000000000000 0000000000000000 [ 3.176641] 9000000000d3de08 9000000001639390 90000000002086d8 00007ffff0080286 [ 3.186260] 00000000000000b0 0000000000000004 0000000000000000 0000000000071c1c [ 3.195868] ... [ 3.199917] Call Trace: [ 3.203941] [<90000000002086d8>] show_stack+0x38/0x14c [ 3.210666] [<9000000000cf846c>] dump_stack_lvl+0x60/0x88 [ 3.217625] [<900000000023d268>] __warn+0xd0/0x100 [ 3.223958] [<9000000000cf3c90>] warn_slowpath_fmt+0x7c/0xcc [ 3.231150] [<9000000000210220>] show_cpuinfo+0x5e8/0x5f0 [ 3.238080] [<90000000004f578c>] seq_read_iter+0x354/0x4b4 [ 3.245098] [<90000000004c2e90>] new_sync_read+0x17c/0x1c4 [ 3.252114] [<90000000004c5174>] vfs_read+0x138/0x1d0 [ 3.258694] [<90000000004c55f8>] ksys_read+0x70/0x100 [ 3.265265] [<9000000000cfde9c>] do_syscall+0x7c/0x94 [ 3.271820] [<9000000000202fe4>] handle_syscall+0xc4/0x160 [ 3.281824] ---[ end trace 8b484262b4b8c24c ]---

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
4.5% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Affected Products 8

VendorProductVersionRange
linuxlinux_kernel* <4.9.331
linuxlinux_kernel*≥4.10  –  <4.14.296
linuxlinux_kernel*≥4.15  –  <4.19.262
linuxlinux_kernel*≥4.20  –  <5.4.220
linuxlinux_kernel*≥5.5  –  <5.10.150
linuxlinux_kernel*≥5.11  –  <5.15.75
linuxlinux_kernel*≥5.16  –  <5.19.17
linuxlinux_kernel*≥6.0  –  <6.0.3

References 9

  • git.kernel.org https://git.kernel.org/stable/c/16c546e148fa6d14a019431436a6f7b4087dbccd
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/2e3863cc02c156b51b50592d43ffa6a13b680b0d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/5177bdc38eaa1c1ca6302214ab06913540cd00a2
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/6a73e6edcbf3cdd82796dcdf0c0f5fe5d91021af
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/7efe61dc6aa45aab8a40e304fa2dae21e33b0db4
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/844748412be03a236dcf4a208b588162a275e189
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/8f96aa67c2ccbd7e41b8dc992b8d13cfe206d571
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/cd251d39b13485eb94ee65bb000d024e02c00e45
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/dbd964a733db015bbb9dff592c259c736398140f
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/16c546e148fa6d14a019431436a6f7b4087dbccd
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/2e3863cc02c156b51b50592d43ffa6a13b680b0d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/5177bdc38eaa1c1ca6302214ab06913540cd00a2
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/6a73e6edcbf3cdd82796dcdf0c0f5fe5d91021af
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/7efe61dc6aa45aab8a40e304fa2dae21e33b0db4
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/844748412be03a236dcf4a208b588162a275e189
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/8f96aa67c2ccbd7e41b8dc992b8d13cfe206d571
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/cd251d39b13485eb94ee65bb000d024e02c00e45
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/dbd964a733db015bbb9dff592c259c736398140f
    Patch